Lubricating device



March 5, 1935. v H, KREIDEL I LUBRICATING DEvcE Filed Feb. 16, 1953 Patented Mali 5,` 193s f V l f1,993,4s`2" v LUBRIoATmGnEvIc Hans Kredel, Wiesbaden, GermanyV Application February'ic, '1933,seria1N0.656,993

v 10 Claims.V (Cyl. 1811-27)- 1 The inventienfrentes toma .lubricating `dei/ice An *opening provided in the bottom of ,the containing `a suction and pressure pump for the pump cylinder 9 is able to registerwith the two purpose of periodically` and'A automatically feedadjoining openings of the channels v'7 and 8. as ingrangexactly metered quantity of oil under high the pump cylinder swivels around the pivot 6. 5 `pressure to lubricating lines or parts to be lubri-f The interior of the pumpcylinder 9 may in this 5 cated. The lubricating device in this way adapts way; intermittently communicate with the sucitself particularly well for the lubrication of runtion channel. 'l or with the feeding channel 8 ning chains as well asgfor thepurpose of feeding (Fig. 1);- 11 denotesan opening in the annular oil to high pressure lines such as they are, for eye` part ,10;of, the pump cylinder 9 andhas for p example, employed in connection with central its purpose vto Vensure a free communication of 1Q lubricating devices. AIn contra-distinctionto the the oil channel 7 with Vthe-interior of the oil lubricatingl devices thatare in use l for lsimilar reservoir during all, possible-angular positions of purposes, the presentv invention provides a smthe pump-cylinder. 'I'wo discs 12 are united ple: construction in which complicated arrangeby means o-fgtheipins 13 which are loosely tted l5 ments andY sensitive distributing elements "such on` the pivotl so that they may` move around it. l5

asgvalves and the like are avoided. `The device Airing 15- made o f spring wire is tted into a requires very little powerffor its operation and' groove of the pivot 6 and prevents axial displacemay be made to function reliably andaccurately l ment of vthe annualy eye part 1101 of the pump cyl-A even in the smallestembodiments.. The pumpof inderand of the two discs 12. The upper end of the lubricating-device `of the presentlinventioin p a plunger ldwhich is reciprocable in the pump 20v has va -lowg speed lubricant suction stroke and a cylinder is'connected to afgudgeon pin 18 on the rapdlubricant `disci-large stroke. l A feed wheel l'l'which is rotatable on the axle 20.

p The drawing shows one` of many possible ,ern- The upper end of the plunger .orconnectingV rod bodiments 'of the invention. A 16 `is fitted with transverse rods 19. Coiled- Fig."1' is avertical section through the lubricatsprings 14 each Vhave one endlsecured to one of 25. ing device. 4 these transverse `rods 19gand the other end to Fig; 2 is a verticalsectional view taken on the the pins 13. Rotation of the wheel 17 in the line 2.-2. of AFigure 1. p v l direction of the arrow in Fig.1`, causing thegud- Fig. 3 shows a section of some details of,` the geen pin` 118 `of thejplunger 16 lto. describe a cirpump drive takenon the line `3-,3 of Figure 1 and cular path, not only brings about a displacement 30 Fig. -flis a fragmentary elevation of the-bearof the; plunger 16 in the pump1 cylinder 9 and a ing parts of the suction and pressure pumprthe successive ltensioning and release of the springs parts arranged in front of it having been omitted.` 1.4, Vbut also causes the pump cylinder 9` with The oilkreservoirl comprises aside wall 1 having itsfannular eyepart `10 to oscillate about the pivo-t CJI cover `3i, these parts being united to one another of the plunger 16 (suction stroke) the interior in oil-tight engagement by means of a number ofthe `pump cylinder 9 communicates with the of screws 4. p 5 denotes the filler plug. A pivot 6 suctionchannel` 7 and thereby with the interior is screwed into Athe wall 2 and is located in` the of theoil reservoir,` while during the descending 40 reservoir inaslow a` position as possible. This motion'of `the plunger 16 (compression stroke) 40 pivot 6" is provided with two adjoining channels the inter0rof`the pump cylinder 9 communicates a suction channel 7 and a1 feeding channel 8 with the feeding channel 8 and thereby with the which latter is` led through the side wall of the pressureline that leads to the exterior. Apo-` reservoir to the exterior thereof. A pump cylinsition of feed is indicatedin Fig. 1 by dotted der 9 `has an annular eye part 10 andis with lines, the gudgeon pin 18 being in this case in 45 this annular eye part 10lso mounted on the pivot position 18a. p 4 n 6 tha-tit is able to swivel transversely.4 The suc- The `feed `wheel 1-7- which is located `on the tion channel '7: extends-through the pivot while` axle 20 istoothed over somewhat more than half 5 the feeding `c11anne18 `is elbow-shaped, passing of `its 'circumference and is rotated through thelongitudinally :through the pivot and `passing is necessary that Vlooththe feed lever 21 and the through the wall 2 and the side wall 1 to theexpawl 22( be pressed against the circumference of terior. The suction channel 7 has thustwo openthe feed' wheel 17 during action.. and` this press- `ings `on the` surface of thepivot 6 while: the feedlflg Of-` the Said Darts againstY the circumference ing channel Sfhasonly one.y i

a ribor wall 2. fitted perpendicularly to itL and a 6 in such a wayv that during the ascending motionl 35` @my half `Wayythroughwthe pivot and extending action ci the feed lever 21 and the; pawl 22. :It 5.0@

ofthe-.feed wheel rz` can be aceompiishedin'dn- 55,i

ferent ways. The pawl 22 has two arms and is mounted on the pin 24, the pawl being held to the wheel 17 by spring 23. The feed lever 21 likewise has two arms which together form a bell crank lever. Its free arm carries a iioat 30 which, displacing lubricant contained in the reservoir, presses the feed lever 2l against the circumference of the feed wheel 17. The feed lever 21 itself is appropriately mounted on an eccentric 25 of a Worm wheel 26 which.A is rotatable upon the axle 27. The worm wheel 26 is driven by a worm 28 which is in mesh with it and is secured to or formed integrally with a shaft 29 that projects through the side wallfl to the exterior. The shaft 29 is journaled in the said side wall l and in an angular bearing. part tted to the wall 2, and may b-e driven by any suitablemeans. Rotation of the worm wheel 26` imparts a reciprocatory feed motion to the feed lever 21because of the action of the eccentric 25 upon which it is mounted. This feed motion of they feed lever 21 causes slow rotation ofthe feed wheel 17. The stroke of the feed lever 21 is amply sufficient to rotate the feed wheel 17 through an angle corresponding to the pitch of the ratchet teeth thereon,.and when thus advanced thefeed wheel is restrained from return movement by the pawl 22. The feed wheel 17 is toothed over somewhat more than half of its circumference. Rotation of the feed wheel 17 causes-the plunger- 16 to be raised'so as to suck a quantity of the lubricant into the suction channel and into the pump cylinder. The springs are thus placed under tension and the pump cylinder `9 swivels in such a manner as to move its suction opening slowly away from the suction channel 7. In the meantime, a quantity of the lubricant is drawn intol the pump cylinder. Thetensioned springs 14 will then be released as soon as the gudgeon pin 18 has passed-its upper dead center during the rotation of the feed wheel 17-and this causes the plunger 16 to be jerked back into the'pump cylinder 9. During the downward or discharge stroke of the plunger the opening in the feed channel 8 in the pivot 6 registers with the lower opening of the pump cylinder, Vand the quantity of the lubricant that previously has been sucked into Ithe pump cylinder is fed to a lubricating line or tothe part to be lubricated. The speed at which the plunger 16 jerks back into the pump cylinder is dependent upon the strength and the tension of the springs 14, upon the diameter of the 'saidplunger 16 and upon the viscosity of the lubricant so that different lubricant feedingV speeds may be obtained by the alteration of one or more of these factors. During the generally rapid discharge stroke of the plunger 16 into the pump cylinder, the non-toothed part of thefeed wheel 17 glides over the feed lever 21 and the pawl 22, andthe feed mechanism Vof the feed wheel 17 willbe out of action during this period. The action of the feed mechanism of the feed wheels will recommence as soon as the gudgeon pin 18 of the connecting rod passes its lower dead center, since only then will the feed lever 21 and the pawl 22 mesh again with the toothed part of the feed wheel 17. yA pressure of the lubricant lor. oil to be fed in excess of that allowed for thereby keep the latter tightly pressed against the surface of the pivot 6 during the discharge stroke of the plunger. This ensures an eicient seal between the pivot 6 and the pump cylinder'9 as the latter swivels about the former. Wear of the annular eye part 10 that might occur in the course of time could not disadvantageously influence the operation of the lubricating device inasmuch as the lower part of the pump cylinder that is provided with the oil inlet and outlet opening is pressed tightly against the surface of the pivot 6 throughout the discharge stroke.

In centralized lubricating systems it is highly desirable to maintain the conduits completely iilled with oil, and it is therefore necessary to providemeansfor preventing the discharge of air into the conduits by the pumping mechanism. Unless such Ameans were provided in the device of the present invention, the pump would deliver air to the conduit system when the level of the oil in the reservoir dropped below the inlet port 11. In the present invention, this inconveniencel has been overcome by the provision of a float 30 that is 'carried on an arm of the bell crank feed lever 21, and that, at a certain level of the lubricant in the reservoir automatically throws the pump outof commission. As long as the level of the lubricant in the' reservoir is of a sufficient height, the float 30 will be raised through the buoyant action of the lubricant and the feed lever 21 will thus be sui-liciently pressed against the circumference ofthe feed wheel 17. However, should the level of the lubricant in the reservoir drop below a certain limit, the float 30 would likewise drop so that the feed lever 2l would no4 longer be pressed against the circumference of the feed wheel 17, andv thereby interrupt the rotation ofl this latter.v

The? invention may be embodied in various forms and changes may be made in the drive for the pump plunger. For example, the disc 17 may be secured to its shaft 20 and the latter extend outwardly from the reservoir to be driven by any suitable source of power. Numerous other changes may be made without departing from the basic features of my invention defined in the following claims. f

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is: Y

1. A lubricating device comprising an oil reservoir with a filler spout; a therein rigidly mounted pivot located in a position aslow as possible therein and having asuction channel and a feeding channel with openings at the surface of the pivot the one of which is in communication with the oil reservoir and the other with a pressure feed line that extends to the exterior, a pump cylinder fitted with an annular eye part `by which it is so rattached to the said pivot lthat it may swivel around it, an aperture in the cylinder bottom that is so arranged as to register with the' openings of the suction channel that passes through the pivot and the feeding channel, a plunger moving in the pump cylinder, this plunger with its connecting rod top endv being attached to a gudgeon pin secured to a rotating wheel that is fitted to an axle, the wheel being toothed over a portion of its circumference, a feed lever that engages with the teeth of the wheel and is 'pressed against them, this feed lever being attached to a rotating eccentric bythe aid of which it receives its feeding motion, f Y f f,

2. A lubricating device comprising an oil reservoir with a filler spout; a therein rigidly mount-Y ed pivot located in a position as low as possible recense theV oil reservoir and the-fother with;` a4 pressure feedV line that extends to .thevexteri'orj `a pump cylinder fitted with an annular eye part `by which it is so attached tothesaidv pivot thatitmay swivel around it; an aperture in thecylinder bottom'that is so Iarranged as to register with the openings: of the suction channel that passes through the pivot and the feeding channel; aplungermoving in the pump cylinder,` this plunger with its l connecting rod top end being attached to avgudgeon pin secured-'toA a rotatingfwheel that is Afitted to an axle, the wheel being toothed over aV portion only of its circumference; a feed lever that engages with the teeth of the wheel and is pressed against them, this feed lever being attached to a rotating eccentric by the aid of `whichit receivesits feeding motion; and a pawl that, under the action of a spring, engages with the teeth of the said wheel for the purpose of preventing a returnmotion of this wheel.

3. A lubricating device comprising an oil reservoir with a filler spout; a therein rigidly mounted pivot located in a position as low as possible therein and having'a suction channel anda feeding Y channel with openings at the surface of thepivot the one of which is in communication with the oil reservoir and the other with a pressure feed line that extends to the exterior; a pump cylinder tted with an annular eye part by which it is so attached to the said pivot that it may swivel around it; an aperture in the cylinder bottom that is so arranged as to register with the openings of the suction channel that passes through the pivot and the feeding channel; a plunger moving in the pump cylinder; this `plunger with its connecting rod topend being attached to a gudgeon pin sedcured to a rotating wheel that is fitted to an axle, the wheel being toothed over a portion of its circumference; a feed lever that engages with the teeth of the wheel and is pressed against them, this feed lever being attached to an eccentric by the aid of which it receives its feeding motion; and a pawl that, under the action of a spring, engages with the teeth of the said wheel for the purpose of preventing areturn motion of this wheel,` a shaft on to which the eccentric that serves to communicate the feeding motion to the feed lever, a worm wheel on saidV shaft, and av worm meshing with the said worm wheel andbeing seated on a shaft that extends out of the oil reservoir.

4. A lubricating device comprising an oil reservoir with a filler spout; a therein rigidly mounted pivot located in a position as low as possible therein and having a suction channel and a feeding channel with openings at the surface ofthe `pvot the one of vwhich is in communicationwith the oil reservoir and the othery with a pressure feed line that extends to the exterior; a pump cylinder fitted with an annular eyepart by which it isso attached to the said pivot that it may swivel around it; an aperture in the` cylinder bottom that is so arranged as to register with the openings of the suction channel that passes through the pivot and the feeding channel; a plunger moving in the pump cylinder, a rotating toothed drive wheel, a gudgeon pin carried by said wheel and pivotally connecting the end of said plunger to said wheel, a feed lever that engages with the teeth of the wheel and ispressed against them, an eccentric for oscillating said feed lever, a worm wheel connected to said eccentric, a spring pressed pawl enery of the wheel.

gag'eabl'e withA the teeth of the said'drivawheel for thepurpose. of preventing return Vmotion thereof.; a shaft on. which saideccentric and said worin-wheel' are secured, a worm meshing. with the said worm wheel and `being seatedgon a shaft that extends out of the oil reservoir, the said vpivot located in a position as low as possible therein and having a suction channel and a feeding channel with openings at the surface of the pivot the fone of which is in communication with the oil reservoir and the other with a pressure feed line that extends to the exterior; a pump cylinder fitted with an annular eye part by which it is so attached to the said pivot that, it may swivel `around it; an aperture in the cylinder bottom that is so arranged as to register with the openings of the suction channel that passes through the pivot and the feeding channel; a plunger moving in the pump cylinder, a rotatable toothed drive wheel, Va gudgeon pin carried thereby and forming part` of a pivotal connection between said toothed wheel and said plunger, a feed lever that engages with the teeth of the wheel and is pressedv against them, an eccentric for imparting a feeding motion to said feed lever, a spring pressed pawl engageable with the teeth f thev said wheel for the purpose of preventing a return motion of this wheel, a worm wheel for rotating said eccentric, a worm meshing withl the said worm wheel, a shaft carrying said worm and extending out of the oil reservoir, said drive wheel being toothed only v over somewhat more than half of its circumference, the other part of the wheel having a smooth circular peripheral edge, coiled springs each having one end attached to the connecting rod top end and its other end attached to the pivot of the Vpump cylinder, said feed lever being in the form of a bell crank lever and having a oat attached to it the buoyancy of the oat causing the teeth of the feed lever to be pressed against the periph- 6. Lubricating device in accordance with claim 4, thereby characterized that the springs which with their one end are attached to the connecting rod top end are,`with their other end, attached to specially provided discs that are loosely fitted on the pivot of the pump cylinder.

7. vIn a pump for centralized lubricating systems, the combination of a cylinder, a plunger reciprocable therein, resilient means for actuating said plunger upon its discharge stroke, a ratchet wheel having a part operative to actuate said plunger throughout its suction stroke, a pawl engageable with said ratchet wheel, and a buoyant element for holding said pawl in cooperative engagement .with said ratchet wheel.

8. In a pump and reservoir installation for centralized lubricating systems, the combination of a lubricant reservoir, a pump having an inlet port adjacent the bottom of said reservoir, a disengageable mechanism comprising `a pawl and ratchet for operating said pump, and means controlled by the level of the lubricant in said reservoir to hold said pawl in operative engagement with said ratchet as long as the lubricant level is above a predetermined 9, vIn a force feed lubricaton the combination of. a reservoir,l a pivot studs'ecured thereto` adjacent-the bottom .thereof,1 said studhaving inlet and discharge passageways', a cylinder having ra sleeve surrounding vsaid stud,xsaid cylinder having a port registerable alternately. with the endsy of said passagewayszrespectively upon oscillation of saidcylinder about said stud, aplunger in said cylinder, rotating c meansy pivotally` connected. to said plunger for withdrawing `the plungerfrom said cylinder, anda plurality of springs forforcing said plunger into said cylinder, each Aof said springs having one end secured tosaid plunger and the otherend pivotally secured to said stud. 10. In a force feed lubricator, the combination of a reservoir,y a plungery pump" in said reservoir, resilientxmeans .for actuatingv said-pump. upon the discharge stroke thereof, a crank disk having a crank pin pivotallyvconnected to the plunger of said pump, said disk having ratchet teeth formed infacportion only of the .periphery thereof, an eccentric, means for rotating said eccentric, a pawl mountedupon saideccentric to be oscillated thereby, .anda oat connected to said pawl and operative to maintainlthe latter in position for engagementA with said ratchet teethv on said disk y 

